Rotary bearing for suspended shafts.



F. R. BARNHBISEL.

ROTARY BEARING PoR SUSPENDED sHAPTs.

APPLICATION FILED JAN. 22, 1907.

, Patented June 14,1910.

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E. R. BARNHEISEL. ROTARY BEARING FOR SUSPENDED SHAPTS.

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Patented June 14,1910.

APPLICATION FILED JAN. Z2, 1907.

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Specication of Letters Patent.

Patented June 14, 1910.

Original application filed October 17, 1905, Serial No. 283,121. Dividedand this application led January To all whom it may concern:

Be it known that I, FREDERICK R. BARN- i-inisni., a citizen of theUnited States, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in RotaryBearings for Suspended Shafts, of which the following is aspecification, the same being a division of application, Serial No.283,121, iiled October 17, 1905.

The present invention relates to mounting and supporting a verticallysuspended shaft by means of a. specially constructed bearing located ata point easy of access for lubricating the bearings and for the purposeof repair or adjustment; and in providing a step or lower bearing foremergency use, when the upper bearing is inoperative, so that theordinary use of the shaft will not be prevented.

rlhe invention further relates to the construction of the upper bearing,by which an oil cup is provided for lubricating purposes, and also tothe means for adjusting the vertical position of the shaft within thebearing.

The invention consists in the features of construction and combinationof parts hereinafter described and claimed.

The bearing is specially applicable for use in supporting the shaft of arotary baking plane, and is so illustrated in the drawings for thepurpose of showing the invention in one form of use, with a verticallysuspended shaft.

In the drawings Figure 1 is a longitudinal sectional elevation of arotary bake oven showing the4 method of supporting the shaft; Fig. 2 anenlarged view of the rotary shaft, bearing and baking plane; and Fig. 3an enlarged detail of the bearing cup.

The bearing and supporting mechanismis shown in connection with a bakeoven 4, which may be of any suitable character, having therein acylindrical baking chamber 5. Through the center of the baking chamberextends a vertical shaft 6 which supports a circular baking table 7Since the particular shape and construction of the baking table forms nopart of the present invention, it is not deemed necessary to give adetailed description of the same. The shaft passes through a crowncasting 8 in the center of the roof 9 of the baking chamber and throughan upwardly extending tubular Serial No. 353,484.

sleeve 10. rlhe rotary shaft is hung from a bearing 11 suitablysupported above the oven, and said bearing consists of a casing 12having an outer wall 13 and an inner wall 14 forming an annular oil cup15, the bottom 16 of which is dished and serves as a socket for aleveling washer 17, which is rounded on its lower face to conform to thegravity of the dished bottom of the annular oil chamber. Above theleveling washer is a lower bearing ring 18 of hardened steel, whichserves as a trackway for a series of balls 19, which are held in placeby means of a ring plate 2() having circular holes 21 of proper diameterto embrace the balls, and the upper and lower edges 22 of the holes areinwardly crimped or forced to hold the ring in position with respect tothe balls entered therethrough. An upper bearing 28 is located upon andmovable with the upper set of balls and projects slightly above thewalls of the annular oil cup and serves as a support for a plate 24having a hub 25 which is rigidly mounted on the shaft and is held inplace by means of a set screw 26. The shaft is provided with a series ofholes 27 arranged in staggered relation around the outer face of theshaft, in any one of which the set screw is adapted to be entered forregulating the vertical position of the shaft.

The lower end of the shaft is provided with a cone bearing 28 ofhardened steel, which bearing is encircled and held in place by a collar29, and the bearing as a whole is mounted within` a casing 30 locatedwithin a well 31 in the center of the floor of the baking chamber, whichcasing 30 is provided in its center with a concave step 32 adapted toreceive the point of the cone bearing when the shaft is lowered.

The construction of the socket is one which provides a method of easilyand constantly lubricating the bearings by the provision of an oil cup,within which a lubricant can be poured. At the same time the lubricantis outside of and away from the baking chamber, so that no fumes orodors which might impair the baking product can enter into the bakingchamber. The concave shape of the bearing socket and the provision ofthe leveling washer serve to maintain the bearing surface true at alltimes, and this is important in view of the fact that the load supportedby the shaft will serve to hold the shaft in a vertical position at alltimes, whereby it is highly essential that the bearing surfaces bemaintained in a horizontal position in order to prevent binding orfriction. The provision Vof the lower step serves to maintain the shaftagainst any swinging or vibration, and serves as a support for the shaftin the case of emergency, and permits its rotation so that the operationof the oven will not be impaired or seriously obstructed by accidents tothe regular bearings. By suspending the shaft in the manner indicated,it is possible to adjust the vertical position of the shaft and bakingplane carried thereby to a very considerable degree, which would beimpossible if the shaft were supported from below in the usual manner.The arrangement is much more convenient and satisfactory in all respectsthan the ordinary method vof mounting a shaft of this character.

Al/Vhile the advantages and utility of the bearing for suspended shaftsof the present invention have been pointed out, particularly withreference to supporting a rotary baking plane, it is to be understoodthat the use of such bearing is not confined to a baking plane, as thebearing is adapted for useand intended for use with suspended r0-tatable shafts generally.

What I claim as new and desire to secure y by Letters Patent is:

l. In a bearing for suspended shafts, the combination of a rotatablevertical shaft, a casing having an annular channel and surrounding theshaft, a series of rotatable members located within the annular channelof the casing, bearing rings within the channel one above and one belowthe rotatable members, a plate rigidly secured to the.

shaft and resting on the upper bearing ring and suspending the shaft, aplane horizontally extending from and carried by and rotatable with theshaft, and a step bearing below the lower end of the suspended shaftserving as an emergency bearing for suspending the shaft, substantiallyas described.

2. In a bearing for suspended shafts, the combination of a rotatablevertical shaft, a casing having an annular channel and surrounding theshaft, a series of rotatable members located within the annular channelof the casing, bearing rings within the channel one above-and one belowthe rotatable members, a plate rigidly secured to the shaft and restingon the upper bearing ring and suspending the shaft, a plane horizontallyextending from and carried by and rotatable with the shaft, a cone atthe lower end of the shaft, and a step bearing below the cone forsupporting the shaft fro-m below when lowered, substantially asdescribed.

3. In a rotary bearing for suspended shafts, the combination of arotatable vertical shaft, a casing havingan annular channel dished atits bottom and surrounding the shaft, a leveling washer shaped toconform to the dish of the bottom of the annular channel, a plurality ofballs within the annular channel, bearing rings one above and one belowthe balls, a flange rigidly secured to the shaft and resting on theupper bearing ring and suspending the shaft, a plane horizontallyextending from and carried by and revoluble with the shaft, a cone atthe lower end of the shaft, and a step bearing below the cone forsupporting the shaft from below when lowered, substantially asdescribed.

FREDERICK R. BARNHEISEL.

Witnesses: l/VALKER BANNING,

IVILLIAM H. AIKEN.

